Storage

[kroert99]

How are you guys storing the unused vials? I read the freezer but then I vaguely remember seeing something that it shouldn't go in the freezer. I'm now officially confused. Thanks!

 

[glpfun]

[archived internal link]

Storing your peptides?

Oct 27, 2024

So I’ve read that peptides should be stored at -20 °C which is -4 °F. My freezer in my apartment doesn’t uhh get that cold maybe 15 to 25 °F . I just ordered a thermometer to keep in there.

My question is, is this an acceptable temperature to store them at 15-25 degrees?

matrtx

Replies: 10

Forum: Public Square

 

[kroert99]

Storing your peptides?

Oct 27, 2024

So I’ve read that peptides should be stored at -20 °C which is -4 °F. My freezer in my apartment doesn’t uhh get that cold maybe 15 to 25 °F . I just ordered a thermometer to keep in there.

My question is, is this an acceptable temperature to store them at 15-25 degrees?

matrtx

Replies: 10

Forum: Public Square

Thank you. My freezer says it's 0, and they won't be stored for years either. The thread you posted was helpful. Thank you again.

 

[zpped]

How are you guys storing the unused vials? I read the freezer but then I vaguely remember seeing something that it shouldn't go in the freezer. I'm now officially confused. Thanks!

reconned vials shouldn't be frozen but lyophilized vials are pretty much the colder the better. But better is pretty minimal really.

 

[aloil]

reconned vials shouldn't be frozen but lyophilized vials are pretty much the colder the better. But better is pretty minimal really.

How minimal an improvement is lower temperature? Is it reasonable to store un-reconstituted vials intended for up to 1.5 years in a fridge if the alternative is a frost-free freezer with erratic temperatures?

With shipping and testing costs it would be less expensive to order two kits at once, but that would mean storing the last vial for 19 months, maybe longer.

 

[penewbie]

How minimal an improvement is lower temperature? Is it reasonable to store un-reconstituted vials intended for up to 1.5 years in a fridge if the alternative is a frost-free freezer with erratic temperatures?

With shipping and testing costs it would be less expensive to order two kits at once, but that would mean storing the last vial for 19 months, maybe longer.

My gut feeling says that the erratic freezer temps would be better than stable fridge temps.

But it can be even better by mitigation, simply using a food thermos would stabilize the temperature swings.

 

[GimmeABreak]

My gut feeling says that the erratic freezer temps would be better than stable fridge temps.

But it can be even better by mitigation, simply using a food thermos would stabilize the temperature swings.

Putting the lyophilized peps in a thermos (insulated food storage container) in the freezer will limit the temp variations of a frost free or even manual defrost freezer.

 

[zpped]

How minimal an improvement is lower temperature? Is it reasonable to store un-reconstituted vials intended for up to 1.5 years in a fridge if the alternative is a frost-free freezer with erratic temperatures?

With shipping and testing costs it would be less expensive to order two kits at once, but that would mean storing the last vial for 19 months, maybe longer.

You'll have to make your way into the testing server to see the specifics, but a few percent.

I'll say personally I have no issue storing it in the cabinet for a few months, in the fridge for a year and in a regular freezer for >5 years before I think about being concerned about losing any meaningful efficacy.

 

[leokitcat]

Frost free freezers have more stable temps at the bottom of the freezer well below the frost free heating element which is usually somewhere mid way up (remember heat rises)

 

[Calm Logic]

Per Gemini:

Door openings are often the biggest cause of temperature instability, so items placed deeper within the freezer, away from the door, tend to experience fewer rapid fluctuations.

While it's true that heat rises, in a fan-forced system like a frost-free freezer, the air circulation driven by the fan overrides natural convection. The fan actively pushes cold air into all areas.

The fan-forced air circulation is designed to maintain a consistent temperature, and the defrost heating element (wherever it's located) causes a temporary temperature rise throughout the compartment during its cycle. For optimal long-term storage, the key is proper loading to allow air circulation and minimizing door open times, rather than relying on a specific shelf being inherently more stable.